Thomas Scherer
About the article

Power LED driver module (PLDM)

Power LED driver module (PLDM)
This year, for the first time, the efficiency of LEDs has overtaken that of fluorescent tubes. Power LEDs are thus now a realistic and energy-saving alternative to other forms of lighting. Getting them to light up, however, needs a bit of electronics, and hence the universal module described in this article.One thing is for sure: the twenty-first century will be the age of semiconductor light sources. This universal current source can drive up to eight white LEDs.
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Gerber file

CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor GREEN and GOLD members can exclusively download these files for free as part of their membership. Gerber files allow a PCB to be produced on an appropriate device available locally, or through an online PCB manufacturing service.

Elektor recommends its business partner Eurocircuits as the company of choice for its own prototypes and volume production in selected cases.

Component list
R1 = 1O / 2W (carbon film or metal film)
R2 = 10k
R3 = 1k
R4 = 2kO2
P1 = 10k

C1 = 1000µF 50V*
C2 = 100nF
C3 = 220µF 35V*

D1,D2,D3 = SB340*
D4 = ZPD33V*
IC1 = LM2575Z-ADJ*
IC2 = LM385Z1.2

L1 = 330µH / 1.9A* (SMD power inductor, e.g. FASTRON PISR-331M-04 (Reichelt # L-PISR 330µ)
Tr = 2 x 6-27 V*
PCB, ref. 071129-1
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